A nuclear fuel rod storage container

Abstract

The application relates to a nuclear fuel rod storage container which comprises a base, a lower storage chamber, an upper closed chamber, fastening pressure rings and elastic plates, the lower storage chamber and the upper closed chamber are matched with each other, the top of the lower storage chamber is provided with a through hole, the bottom of the upper closed chamber is provided with a screw rod and a cover body, the screw rod is fixedly connected with the through hole through a nut, a plurality of fastening pressure rings are arranged in the lower storage chamber, and the elastic plates are fixed to the bottom of the lower storage chamber through extension springs. The screw rod and the cover body of the application can guarantee the sealing of the contact position, the screw rod is fixedly connected with the through hole through the nut, the cover body is arranged on the outer side of the screw rod, a sealing layer is arranged on the inner side of the cover body, the sealing layer can seal the matched position of the lower storage chamber and the upper closed chamber, the fastening pressure rings can accommodate the nuclear fuel rods, the fixed ring body can fix the nuclear fuel rods, the opening of the fixed ring body is obliquely arranged to fix the nuclear fuel rods, the bottom elastic plates can buffer the nuclear fuel rods when the nuclear fuel rods are put in, and the device has high sealing property and stability.

Description

Technical Field

[0001] This application relates to the field of nuclear power equipment technology, and more specifically, to a nuclear fuel rod storage container. Background Technology

[0002] A nuclear fuel assembly is a complete set of fuel elements assembled together. It consists of several fuel elements, an upper hub, a lower hub, control rod guide tubes, and positioning grids, and does not need to be disassembled during reactor loading and unloading. During the operation of a nuclear power plant, individual rods in a nuclear fuel assembly may break. A nuclear fuel assembly with a broken and failed single rod will no longer be able to be put back into the reactor for operation. Since a nuclear fuel assembly with a broken single rod is no longer capable of being put back into the reactor for operation, it must be replaced with a new fuel rod.

[0003] Currently, during nuclear power plant fuel assembly replacement and maintenance, the plant building lacks a suitable work platform for implementing the process. Existing nuclear fuel inspection stations are primarily used for visual inspection and storage of nuclear fuel assemblies during reception. These stations store fuel assemblies by providing support for the upper and lower tubing, but their sealing and stability are poor. There are very few existing nuclear fuel rod storage containers available, therefore, there is an urgent need for such containers. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a nuclear fuel rod storage container, which uses a lower storage chamber and an upper closed chamber to store nuclear fuel rods. The screw and the cover can ensure the seal at the contact point between the two. The fastening ring can hold the nuclear fuel rods, the fixing ring can fix them, and the bottom elastic plate can cushion the nuclear fuel rods when they are put in. The device has high overall sealing performance and stability.

[0005] The objective of this application is achieved through the following technical solution: A nuclear fuel rod storage container includes a base, a lower storage chamber, an upper sealed chamber, fastening rings, and an elastic plate. The lower storage chamber is fixed above the base and cooperates with the upper sealed chamber. The lower storage chamber has a through hole at its top, and the upper sealed chamber has a screw and a cover at its bottom. The screw is fixed to the through hole by a nut. The lower storage chamber contains several fastening rings, and the inner wall of the lower storage chamber has a groove. Each fastening ring includes an outer contour, an inner mating ring, and a fixing ring. The outer contour mates with the groove, the inner mating ring is located inside the outer contour, and the inner mating ring has a mating groove. The fixing ring is located within the mating groove and has a certain height. The elastic plate is fixed to the bottom of the lower storage chamber by a telescopic spring.

[0006] As a further improvement of this application, the inner wall of the lower storage chamber is inclined, and the outer contour of the fastening ring is of different sizes.

[0007] As a further improvement of this application, the fixed ring body has an opening inside, and the opening is inclined.

[0008] As a further improvement to this application, a sealing layer is provided inside the cover.

[0009] As a further improvement to this application, the lower storage chamber and the upper enclosed chamber are in the shape of a regular hexagonal prism or a cylinder.

[0010] As a further improvement of this application, a reinforcing rib is provided between the base and the lower storage chamber.

[0011] As a further improvement to this application, the top of the upper enclosed chamber is provided with a gripping handle.

[0012] As a further improvement to this application, the base is provided with fixing holes around its perimeter.

[0013] As a further improvement to this application, the lower storage chamber and the upper enclosed chamber are made of boron stainless steel.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention enables the storage of nuclear fuel rods using a lower storage chamber and an upper enclosed chamber. The screw and the cover ensure a seal at their contact points. The screw is fixed to the through hole by a nut. The cover is located outside the screw, and a sealing layer is provided inside the cover. The sealing layer seals the interface between the lower storage chamber and the upper enclosed chamber. The fastening ring stores the nuclear fuel rods, and the fixing ring secures them. The inclined opening of the fixing ring further secures the nuclear fuel rods. The bottom elastic plate cushions the nuclear fuel rods during insertion. The device has high overall sealing and stability. The fixing ring is replaceable to meet the storage requirements of nuclear fuel rods of different sizes. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a nuclear fuel rod storage container provided for some embodiments of this application; Figure 2 A cross-sectional view of a nuclear fuel rod storage container provided for some embodiments of this application; Figure 3 Another structural schematic diagram of a nuclear fuel rod storage container provided for some embodiments of this application; Figure 4 This is a schematic diagram of the overall structure of a fastening ring in a nuclear fuel rod storage container according to this application; Figure 5 This is a front view of a fastening ring in a nuclear fuel rod storage container according to this application.

[0016] Icons: 1. Base; 2. Lower storage chamber; 3. Upper enclosed chamber; 4. Fastening ring; 5. Elastic plate; 6. Screw; 7. Cover; 8. Outer contour; 9. Inner mating ring; 10. Fixing ring; 11. Mating groove; 12. Telescopic spring; 13. Opening; 14. Reinforcing rib; 15. Grip handle. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments. The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0018] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0019] Referring to the accompanying drawings, an embodiment of this application proposes a nuclear fuel rod storage container, comprising a base 1, a lower storage chamber 2, an upper sealed chamber 3, fastening rings 4, and an elastic plate 5. The lower storage chamber 2 is fixed above the base 1, and the lower storage chamber 2 and the upper sealed chamber 3 cooperate with each other. The top of the lower storage chamber 2 is provided with a through hole, and the bottom of the upper sealed chamber 3 is provided with a screw 6 and a cover 7. The screw 6 corresponds to the through hole to achieve the cooperation between the upper sealed chamber 3 and the lower storage chamber 2. The cover 7 is located outside the through hole, and the inner side of the cover 7 is provided with a sealing layer for sealing the cooperation between the two. The screw 6 is fixed to the through hole by a nut. The lower storage chamber 2 is provided with several fastening rings 4, and the inner wall of the lower storage chamber 2 is provided with a groove. The fastening ring 4 includes an outer contour 8, an inner mating ring 9, and a fixing ring 10. The outer contour 8 and the inner mating ring 9 are threaded together. The outer contour 8 mates with the groove, and the fastening pressure ring 4 mates with the groove. The inner mating ring 9 is located inside the outer contour 8 and has a mating groove 11. The fixing ring body 10 is located in the mating groove 11 and has an internal thread. One side of the fixing ring body 10 has an external thread. The inner mating ring 9 and the fixing ring body 10 are threaded together. The fixing ring body 10 is used to fix the nuclear fuel rods. The fixing ring body 10 has a certain height, and the contact area between the fixing ring body 10 and the nuclear fuel rods is larger. Multiple fastening pressure rings 4 are used to fix the nuclear fuel rods. The elastic plate 5 is fixed to the bottom of the lower storage chamber 2 by a telescopic spring 12. The elastic plate 5 can buffer the nuclear fuel rods when they are placed in, and the overall stability of the device is higher.

[0020] The lower storage chamber 2 has an inclined inner wall, and the outer contour 8 of the fastening ring 4 has different sizes. Multiple fastening rings 4 are arranged from top to bottom. When the nuclear fuel rods are inserted, the nuclear fuel rods and the fixing ring 10 of the fastening ring 4 cooperate with each other. The inclined arrangement of the lower storage chamber 2 facilitates the insertion of the fastening ring 4.

[0021] The fixed ring 10 has an opening 13 inside, which is inclined and cooperates with the nuclear fuel rod. The inclined opening 13 facilitates the insertion of the nuclear fuel rod. Furthermore, the fixed ring 10 is interchangeable to meet the storage requirements of nuclear fuel rods of different thicknesses.

[0022] Specifically, the lower storage chamber 2 and the upper enclosed chamber 3 are regular hexagonal prisms.

[0023] Among them, a reinforcing rib 14 is provided between the base 1 and the lower storage chamber 2, which improves the structural strength and stability of the lower storage chamber 2.

[0024] The upper sealed chamber 3 is equipped with a gripping handle 15 at the top. A robotic arm can be used to lift the gripping handle 15 to facilitate the addition of nuclear fuel rods into it.

[0025] The base 1 has fixing holes around its perimeter. Screws are used to fix the base 1 to the mounting base below, ensuring that the position of the base 1 is fixed.

[0026] Specifically, the lower storage chamber 2 and the upper enclosed chamber 3 are made of boron stainless steel.

[0027] In use, this utility model utilizes the lower storage chamber 2 and the upper enclosed chamber 3 to store nuclear fuel rods. The screw 6 and the cover 7 ensure a seal at their contact points. The screw 6 is fixed to the through hole by a nut. The cover 7 is located outside the screw 6, and a sealing layer is provided on the inner side of the cover 7. The sealing layer can seal the mating point of the lower storage chamber 2 and the upper enclosed chamber 3. The fastening ring 4 can hold the nuclear fuel rods, and the fixing ring 10 can fix them. The opening 13 of the fixing ring 10 is inclined to fix the nuclear fuel rods. The bottom elastic plate 5 can buffer the nuclear fuel rods when they are placed in. The device has high overall sealing and stability. The fixing ring 10 is replaceable to meet the storage requirements of nuclear fuel rods of different thicknesses.

[0028] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art, all of which fall within the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A nuclear fuel rod storage container, comprising a base (1), a lower storage chamber (2), an upper sealed chamber (3), a fastening ring (4), and an elastic plate (5), characterized in that, The lower storage chamber (2) is fixed above the base (1). The lower storage chamber (2) and the upper closed chamber (3) cooperate with each other. The top of the lower storage chamber (2) is provided with a through hole. The bottom of the upper closed chamber (3) is provided with a screw (6) and a cover (7). The screw (6) and the through hole are fixed by a nut. The lower storage chamber (2) is provided with several fastening pressure rings (4). The inner wall of the lower storage chamber (2) is provided with a groove. The fastening pressure ring (4) includes an outer contour (8), an inner mating ring (9) and a fixing ring body (10). The outer contour (8) cooperates with the groove. The inner mating ring (9) is located inside the outer contour (8). The inner mating ring (9) is provided with a mating groove (11). The fixing ring body (10) is located in the mating groove (11). The fixing ring body (10) has a certain height. The elastic plate (5) is fixed to the bottom of the lower storage chamber (2) by a telescopic spring (12).

2. A nuclear fuel rod storage container according to claim 1, characterized in that, The inner wall of the lower storage chamber (2) is inclined, and the outer contour (8) of the fastening ring (4) is of different sizes.

3. A nuclear fuel rod storage container according to claim 1, characterized in that, The fixed ring (10) has an opening (13) inside, and the opening (13) is inclined.

4. A nuclear fuel rod storage container according to claim 1, characterized in that, The inner side of the cover (7) is provided with a sealing layer.

5. A nuclear fuel rod storage container according to claim 1, characterized in that, The lower storage chamber (2) and the upper enclosed chamber (3) are in the shape of a regular hexagonal prism or a cylinder.

6. A nuclear fuel rod storage container according to claim 1, characterized in that, A reinforcing rib (14) is provided between the base (1) and the lower storage chamber (2).

7. A nuclear fuel rod storage container according to claim 1, characterized in that, The top of the upper enclosed chamber (3) is provided with a grip handle (15).

8. A nuclear fuel rod storage container according to claim 1, characterized in that, The base (1) has fixing holes around its perimeter.

9. A nuclear fuel rod storage container according to claim 1, characterized in that, The lower storage chamber (2) and the upper enclosed chamber (3) are made of boron stainless steel.

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